Carbureter.



PI HI GARBURETBR.

- APPLICATION rum) MAY 22, 1908.

91 1,1 53. I Patented Feb. 2, 1909-.

reame- OTIS, QF EQCHESTITER, N W YORK- OARBURE TEE.

Specification of Letters Patent. Application filed May 22, 1903. Serial434,413.

Patented Feb. 2,, 1909.

To' all whom 'it may concern:

Be it known that I, FRANK H. OTIS, a citizen of the United States, andresident of Rochester, in the county of Monroe and State of New York,have invented certain new and useful Improvements in. Carbureters, ofwhich the following is a specification.

This invention relates to carburetors for explosion engines, andhas forits object to ad ust and maintain during 0 eration the properproportions of air and vdrocarbon admitted to the carbureter, and alsoto introduce the air to the carbureter so as to produce a completemixture.

In the drawings :Figure 1 is a central, vertical section of thecarbureter on the line 1-1 of Fig. 2; Fig. 2 is a bottom view; Fig. 3,is a top view of part of the device; and Egg. 4 is a section on theirregular line 474 of teferring to the drawings, 1 is a float chamber ofthe familiar type, that is adapted for connection with a supply tank bythe pipe 2, and in which the hquid fuel is maintamed as usual,approximately at the constant level shown in Fig. 1 by the float valve3. The float chamber 1 is connected with a mixing chamber 4 by thehorizontal duct 5 that leads into the vertical duct 6 through the rotaiyspindle 7.

The bottom plate 80f the mixing chamber 4 has openings 9 through it forthe admission of air, that register, res ectively, with correspondingopenings "10 t rough a valve-plate.

1 1 that is attached to the spindle 7. Accordingly air in full measureis admitted to the mixing .chamber 4 when, by rotating the spindle 7,the openings 1Q throu h the valve 11 register, respectively, with t eopenings 9 in the bottom 8- of the mixing chamber. And, of course, theair maybe cut down to any extent desired, by the ,rotation of thespindle.

An im ortant feature of the device is the means w ereby the fluid su plyvalve controlling the flow of the fluig fuel from the float chamber tothe mixin chamber is coincidently opened and close 'so that the airsupply is increased and diminished with the supply of li uid'fuel, and aconstant ratio is mamtained etween them. The fuel supply valve is alsooperated by rotation of the spindle, for when the inlet 12 that leads tothe duct 6 in the spindle is directly opposite the duct 5 that leadsfrom the float chamber, the

fluid fuel can flow freely, and as the inlet 12 is turned away from theduct'5 the flow gradually shut 0E till the inlet 12 is turned unisonwith the an valve and the fuel and air be admitted in constant ratio,either the duct 5 in the stationary connection between the float chamber1 and the mixing chamber 4,

or the duct 6 in the spindle 7, at their junc ture 12, is widened so asto prolong the operation. In the drawings the duct 6 is the one enlargedat the juncture 12, and Fig. 4 shows that the opening extends in widthbetween the points where the edges 13, 13 of the opening 10 in therotary plate 11 would, if extended," intersect the spindle 7.

The spindle .7 and its air valve 11 are ro-. tated by means of a lever14 to which the operatingrod 15' isattached, and the. bolt 1 6' and slot17in thecasing and air-valve, re-.. s ectively, limit the rotation ofthe latter.

0th the'lever 14 and the airvalve 11 are rotatively attached to thespindle 7 by square ingthe latter to receive the two former.

Other novel features of thecarbureter are found in the construction ofthe passages through which the air is conducted through the carburetorto mix with the hydrocarbon.

The interior of the mixing chamber 4 is conical in form, narrowingtowards the open end of the spindle 7. Depending from the open mouth ofthis conical chamber, and surrounding the end of the spindle 7, is atube. 16 that has a flaring extension 17 This tube 16 is attached to aplate 18 that rests upon the mixin chamber 4, while a central opening 19an circumferential openings 20 afford passa es for the mixture and;

air, respectively. '1 us the air as it enters" the mixing chamber 4through the valve 11 is conducted by the inwardly tapered wall to the 0en end of the spindle 7, where it is divider part passing between themixing chamber and the depending tube 16, and art passing between saidtube 1 6 and the spin le 7.

The fluid normally stands in the spindle 7 at the level of the fluid inthe float chamber 1,

which, as shown in Fig. 1, is below the outlet 21 of the spindle 7, butthe converging walls of the mixing chamber 4 and tube 16 increase thevelocity of the air that passes between the tube and the spindle 7, sothat it is able to suck the fluid out from the spindle 7. Again, the airthat passes out between the wall of the mixing chamber and the tube 16,

and thence through the openings in the plate '18, is focused upon themixture issuing cm the central opening 19 in said plate 18, and inconsequence produces a t orough mixture of'air and hydrocarbon vapor.

This form of carbureter, therefore, by concentrating and acceleratingthe air in its passage over the liquid discharge duct makes 1t possibleto maintain the liquid at a lower level in said discharge duct than isusual, and so to prevent overflowing while the engine is shut down,which is a fault common to most constructions.

In order that the fiuid may be shut off without disturbing the positionof the spindle when it has been set at the proper point I for the usualre uirements, a needle valve 22 may. also be use that is insertedthrough the spindle4 into the duct 5.

What I claim is 1. A carbureter comprising a chamber having an airinlet, a valve bearing and a lateral fuel supply passage intersectingsaid .bearing, a jet nozzle mounted to turn in said bearing and having aduct in its bearing ortion to register with said supply passage W en thenozzle is turned, and an air valve carried by the nozzletoturntherewith; whereby the fuel passage and air inlet will be openedand closed simultaneously and in the same degree.

2. A carbureter comprising a chamber having anair inlet, a valve bearinand a lateral fuel passage intersecting said caringi a valve-forming jetnozzle extending throng and turning in said bearing and having itslongitudinal bore provided with a lateral duct to register with said supl passage when the nozzle is turned in t e bearing, a needle valve inthe lower end of the nozzle bore and controlling the flow from the saidduct, and an air valve carried by and turning with the said nozzle.

3. A carburetor comprising a chamber having a series of air inlets, arotary valveforming fuel su ply nozzle mounted in the chamber centra lyof said air inlets and having a duct below its up er discharge end; saidchamber having a el passage closed by said rotary nozzle and ada ted tocommunicate through said duct wit the bore of the nozzle when the nozzleis rotated, and an air valve carried by and turning with the nozzle;whereby the liquid passage and the air inlets are opened and closedsimultaneously and in the same degree.

4. A carbureter comprlsing a conical mix ing chamber provided within itsapex with a conical spaced tube, and having air inlets in its base, acombined nozzle and valve mounted to rotate in the base with its upperdischarge end extending within and s aced from said conical tube andprovider between its ends with a lateral duct; said chamher having asupply passage adapted to register with the sald lateral duct, and anair valve mounted on the lower end of said rotary nozzle to turntherewith.

FRANK H. OTIS. Witnesses:

D. GURNEE, L. THON.

